Adjustable lamp



FIG. 1 is a front, right-side perspective view of an adjustable lampshowing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left-side elevational view thereof;

FIG. 7 is a right-side elevational view thereof.

The ornamental design for an adjustable lamp, as shown and described.